Zadanie 7, Paper 2, maj 2025, TZ1, Biologia IB SL
Wzorowane na: Biology SL Paper 2, May 2025, TZ1, pytanie 7. Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
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Zadanie
Polecenie
Carbon participates in molecular structures, ecosystem transfers and changes to the global environment.
(a) Outline bonding properties that allow carbon to form many different molecules.
(b) Describe processes that transfer carbon through an ecosystem.
(c) Explain how human activities contribute to climate change and its consequences.
One additional mark is available for clear, concise communication across the whole response.
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Pokaż rozwiązanieUkryj rozwiązanieKlucz i punktacja
Odpowiedź z klucza
(a)
Carbon can form four bonds. ✔
It forms covalent bonds. ✔
It can form single bonds OR double/triple bonds. ✔
It bonds with other carbon atoms OR other non-metal elements. ✔
It can form branched OR unbranched chains. ✔
It can form single OR multiple rings. ✔
(b)
Carbon dioxide is held in atmospheric or aquatic reservoirs. ✔
Photosynthesis fixes carbon into organic molecules. ✔
Feeding transfers organic carbon between organisms. ✔
Respiration returns carbon dioxide to the environment. ✔
Longer-term stores include fossil fuels, forests and carbonate rock. ✔
Decomposition returns carbon dioxide to the air OR transfers carbon to soil. ✔
Combustion OR volcanic activity releases carbon dioxide. ✔
Some organisms incorporate carbonate into shells or skeletons. ✔
(c)
Greenhouse gases absorb outgoing long-wave radiation and help warm Earth OR increased greenhouse-gas concentrations increase warming. ✔
Fossil-fuel combustion increases atmospheric carbon dioxide and warming. ✔
Livestock production adds methane and strengthens warming. ✔
Industrial processes OR fertilizer production increase concentrations of nitrous oxide or other greenhouse gases. ✔
Deforestation releases stored carbon or removes a carbon sink. ✔
Loss of land ice damages polar habitats OR reduced ice cover lowers albedo and increases absorbed energy. ✔
Warmer surface waters can suppress nutrient upwelling and primary productivity. ✔
Temperature changes OR pH changes threaten coral habitats. ✔
Drought and reduced snowfall can damage habitats or reduce survival. ✔
Faster decomposition of peat or other organic matter can release additional greenhouse gases. ✔
Thermal expansion OR melting land ice raises sea level and affects coastal habitats. ✔
Altered weather extremes can damage organisms and infrastructure. ✔
Species may shift poleward or towards other more suitable areas. ✔
Quality: the complete response is clear on first reading, focused and concise. ✔
Schemat punktowania
Part (a): any 4, max 4; (b): any 4, max 4; (c): any 7, max 7. One holistic communication mark. Total 16. Accept a correctly annotated carbon-cycle diagram.
Umiejętności w zadaniu
- Warming and acidification threatening reefsĆwicz podobne
- Mapping carbon recyclingĆwicz podobne
- Polar ice loss and animal habitatsĆwicz podobne
- Shifting species ranges under warmingĆwicz podobne
- Feedbacks that amplify warmingĆwicz podobne
- Carbon bonding and molecular diversityĆwicz podobne
- Ocean warming and nutrient supplyĆwicz podobne
- Human increases in greenhouse gasesĆwicz podobne